Finding the Fourth Proportional to 1,371.56, 1,892.78 and 782.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.56 : 1,892.78 = 782.07 : x
2. Step 2: Convert to fraction form
   1,371.56/1,892.78 = 782.07/x
3. Step 3: Cross multiply
   1,371.56x = 1,892.78 × 782.07
4. Step 4: Simplify right side
   1,371.56x = 1,480,282.54
5. Step 5: Solve for x
   x = 1,480,282.54/1,371.56
6. Step 6: Final answer
   x = 1,079.27